Jason,
Nope, no messages from Google +, just couldn't do anything with the touchscreen itself for well over 20 minutes. Like I said, Home button worked but back and menu buttons didn't. Push and hold the power button brought up the restart/shutdown screen but no response when you tried to do either. Couldn't swipe down or start any new apps. Couldn't even change pages. All I can figure is that an app on the thing just "took over" the touchscreen functions before finally timing out or completed whatever it was trying to do.
My suspicion now is that it was Words with Friends since that was the last app I had used before it locked up and it seems to have been having issues on both my Tab S and my Note 3 lately.